Yes, actualy Nintendo always using more adanced or fast RAM, so hardly they will use 25GB/s memory speed for Switch. It seems that Wii U has 32GB/s, so it would be crazzy going with Switch with slower memory when hardware will around 2-3x times stronger.

Actually I suspect a huge part of the reason why Nintendo chose Nvidia and ditched AMD and others is because Nvidia's tiling approach dramatically reduces the amount of memory bandwidth needed.

AMD's approach of either having eDRAM/eSRAM or GDDR5 is not workable on a mobile device, it would kill the battery very quickly and cause heating problems.

25GB/sec with a large L2/L3 cache should allow for "better than" PS3/Wii U visuals, and I think that was good enough for Nintendo as long as they got their portability. Done deal for Nvidia.

Also it seems that Wii U has 32GB/s, so it would be crazzy going with Switch with slower memory bandwith when hardware will be around 2-3x times stronger than Wii Us. 

Most logical assume is that is chip Pascal based beacuse Pascal 50GB/s, maybe they can also have large L2/L3 cache, beacuse we already know that this chip is custom Tegra.

Wii U's embedded RAM is a good deal above 32GB/sec I'm pretty sure.

I think 25GB/sec is enough for what Nintendo wants, given Nvidia's tiling set up, it's enough to give you somewhat better than Wii U graphics in a portable form factor, and 25GB/sec saves precious battery life. 

I guess the more pertinent point besides just RAM/bandwidth is Emily says her sources told her the custom Tegra chip in the NS is similar to the Tegra X1.

If that's the case, then it doesn't matter how much RAM or bandwidth it has, a Tegra X1-ish processor is simply not on par with even an XBox One.

Actualy its metter, like I wrote, Switch hardware will be around 3x stronger than WiI U so there is no chanche that Nintendo will use slower RAM than Wii U has for Switch, it doensnt make any sense. Also fact is that Nintendo always pay attention on memory and that's actually most advanced feature of their hardware.

You forgeting that Switch isnt only handheld, its home console and with around 3x stronger hardware than Wii U, so it want be just "somewhat better than Wii U graphics", difference would be very obvious compared to Wii U graphics.

Tegra X2 is also similar to X1, main difference between X1 and X2 is efficiency and bigger memory bandwidth.

Sigh... no it's not.

RAM was also a bottleneck for the Wii U, since the OS took 1 GB and only left 1 GB for developers.

I expect the OS-footprint of the Nintendo Switch to be much smaller than 1 GB... probably around 0.5 GB. The other 3.5 GB will probably be available for game developers.

With 3.5x available RAM compared to the Wii U, the Switch will do fine. 

Eh, I don't know what this huge speculation threads are all about. You are throwing speculated not confirmed numbers around and try to makes something out of it.
We've been only presented with the concept so far and that's it. All the rest of information will be shown in 2017.

I just wait and see what Nintendo has in store and will decide then, if they've missed the shot or not.
I know that Nintendo always follows the philosophy of being different and not trying to compete with Sony and Microsoft, but 3rd party publishers don't really share that philosophy. Their philosophy is to make as much money with a product they can. I applaud Nintendo's attitude for still being innovative and trying something out where nowadays everyone else plays it safe and just upgrades the hardware, but I also wish that Nintendo would go all out and show that they still can offer a platform for everyone to use.

1GB RAM for games is 3-4x more RAM than PS3/Xbox360 have. Like I wrote, 1GB for games for is enuf for purpose of Wii U, to be 720p console, while CPU was actual bottleneck because it's less powerful than PS3/Xbox360 CPUs despite Wii U had 3-4 more RAM and stronger GPU.

I expecting around 1GB of Switch RAM for OS, and definitely 3x more RAM for games than Wii U have will definitely enough and on pair and in balanced with rest of Switch specs.